package com.nowcoder.community.pojo;

//首页中的每一页
public class Page {
    //当前页码（默认为第一页）
    private int current = 1;
    //每页显示帖子数的上限
    private int limit = 10;
    //数据总数（用于计算总页数）
    private int rows;
    //查询路径（用于复用分页链接）
    private String path;

    public int getCurrent() {
        return current;
    }

    public void setCurrent(int current) {
        if (current >= 1) {
            this.current = current;
        }
    }

    public int getLimit() {
        return limit;
    }

    //每次显示的帖子数不超过100
    public void setLimit(int limit) {
        if (limit>=1 && limit<=100) {
            this.limit = limit;
        }
    }

    public int getRows() {
        return rows;
    }

    public void setRows(int rows) {
        if(rows >= 0) {
            this.rows = rows;
        }
    }

    public String getPath() {
        return path;
    }

    public void setPath(String path) {
        this.path = path;
    }

    //获取当前页的起始行，
    public int getOffset(){
        return (this.current - 1) * this.limit;
    }

    //获取总页数
    public int getTotal(){
        if(this.rows%this.limit == 0){
            return this.rows / this.limit;
        }else {
            return this.rows / this.limit + 1;
        }
    }

    //获取起始页码
    public int getFrom(){
        int from = this.current - 2;
        return from<1 ? 1 : from;
    }

    //获取结束页码
    public int getTo(){
        int to = this.current + 2;

        return to>this.getTotal() ? this.getTotal() : to;
    }

    @Override
    public String toString() {
        return "Page{" +
                "current=" + current +
                ", limit=" + limit +
                ", rows=" + rows +
                ", path='" + path + '\'' +
                '}';
    }
}
